US20070233058A1 - Apc Device - Google Patents
Apc Device Download PDFInfo
- Publication number
- US20070233058A1 US20070233058A1 US11/571,850 US57185005A US2007233058A1 US 20070233058 A1 US20070233058 A1 US 20070233058A1 US 57185005 A US57185005 A US 57185005A US 2007233058 A1 US2007233058 A1 US 2007233058A1
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- United States
- Prior art keywords
- voltage
- instrument
- ignition
- instruments
- actuation
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/042—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating using additional gas becoming plasma
Definitions
- the invention relates to an APC device according to the generic definition of Claim 1 .
- APC devices for the operation of instruments for argon plasma coagulation are known, wherein other inert gases besides argon can be used. Reference is made here only be way of example to WO 93/01758.
- the invention is based on the task of constructing an APC device so that several instruments can be operated simultaneously with one single device.
- an APC device for the operation of at least one instrument for argon plasma coagulation, comprising a HF generator to produce a coagulation flow, a control device to control an amplitude of a HF voltage and to adjust a high ignition voltage on an actuation signal, in addition to automatically adjusting a low work voltage as soon as a plasma has been ignited, at least one exit hub for connection of an instrument that comprises an actuation element to produce the actuation signal, this task is resolved in that at least one further connection hub is provided for the simultaneous connection and the simultaneous operation of at least one further instrument and the control device is connected to all exit hubs and is configured in such a manner that during actuation of at least one actuation element and production of at least one actuation signal the HF voltage is interrupted for a define interruption time (t 4 -t 3 ), the HF voltage is then adjusted to the ignition voltage (U Z ) and, after ignition of the plasma on all connected instruments, the HF voltage is adjusted to the operational voltage (U B ).
- one essential point of the invention lies in the fact that, during operation of an instrument, when a further instrument is activated operation of the first (already operating) instrument is briefly interrupted and then a plasma is ignited or re-ignited simultaneously on both instruments. This interruption only negligibly disrupts the currently working surgeon because the plasma may occasionally be extinguished anyway if the correct minimum distance required for working is exceeded.
- the interruption duration is preferably set to a very short time, namely less than 100 ms and preferably less than 20 ms. This duration is then so short that it is not even visually perceived by the surgeon.
- the amplitude of the coagulation current is measured to ascertain whether a plasma has been ignited.
- the HF voltage is then switched back from the ignition voltage to the operational voltage when the real current component exceeds a specific, preset value or another identifying feature of the arc (e.g. the complex resistance of the plasma or a resulting specific signal form) is present.
- the HF voltage is switched back from the ignition voltage to the operational voltage when the current amplitude corresponds to the sum of all coagulation currents that flow to the instruments with the actuation elements actuated after ignition of each plasma. Therefore, an “attempt” is made to ignite until all (actuated) instruments produce a plasma.
- an instrument counter can be provided and configured so that the number of existing actuation signals is recorded, the sum of the coagulation currents before or on arrival of a further actuation signal is detected and the HF voltage is then switched back to the operational voltage when the coagulation current from the HF generator corresponds to the number after arrival of the further actual signal compared with the number before arrival of the further actuation signal. Therefore, which coagulation current has to flow in total when a plasma is present at all actuated instruments is “estimated”. It goes without saying that it is also possible to realise this “estimation” via the aforementioned further measures.
- the ignition voltage is preferably maintained in the form of an ignition pulse for a predetermined duration and is then reduced to the operational voltage. After it has dropped to the operational voltage, a further ignition pulse is then produced if the plasma has not been ignited on all instruments with actuated actuation elements. This measure serves the purpose of safety, to avoid excessive introduction of energy during the presence of the ignition voltage.
- the further instrument hubs are not arranged in the APC device itself, but in an additional housing for connection to the APC device.
- FIG. 1 a schematic depiction of a first embodiment of the invention
- FIG. 2 a schematic depiction of a second embodiment of the invention with an additional housing
- FIGS. 3 a - 3 d schematic depictions of voltage and current profiles.
- the instruments 30 1 to 30 n comprise hollow bodies with a distally arranged nozzle 32 , in whose proximity an electrode 31 is arranged in the hollow body.
- An actuation switch 33 for actuation of the switches S 1 to S n is provided as the actuation element.
- the electrode 31 , the switches S 1 to S n and the interiors of the instruments 30 1 to 30 n are connected to an instrument hub 12 on the APC device via a connecting lead 34 and an instrument connector 35 . From there, the leads are routed on to a HF generator 10 , through a valve 15 to an argon source 16 and a control device 11 , which controls (open or closed loop) the generator 10 and possibly also the argon source (in particular its pressure).
- the above depiction is merely an equivalent depiction and does not show the exact structure of the known APC devices.
- the devices 30 1 to 30 n can be structured differently, e.g. as probes, wherein the actuation switches 33 are usually configured as foot switches.
- This outline depiction will, however, suffice for an understanding of the present invention.
- each of the instruments 30 1 to 30 n is connected via one instrument connector 35 each to one of several instrument hubs 12 .
- a voltage source 13 and, closing the circuit between the voltage source 13 and the switch S 1 to S n , a resistor of a high-pass filter 14 are provided whose capacitor is connected at the output end to the capacitors of the further instrument hub 12 .
- these output hubs of the capacitors or of the high-pass filters 14 are connected to an input of the control device 11 .
- the input ends of the high-pass filters 14 are also connected to a counter device 17 that comprises an adder(-subtracter) and an A/D converter.
- This arrangement makes it possible on the one hand for the control device 11 to obtain information about the time when one of the actuation switches 33 is closed (this information is present at the output of the high-pass filter 14 ) and, on the other hand, how many actuation switches are currently actuated. Moreover, when the appropriate actuation switch 33 is actuated, the valve 15 for each instrument 30 1 to 30 n is opened so that argon gas can only flow to the applicable instrument 30 1 to 30 n , or can only flow out of its nozzle 32 , when the associated actuation switch 33 is actuated.
- FIGS. 3 a - 3 d show the course of the output amplitude U of the HF generator 10 and thus the course of the voltage between the electrode 31 and the patient as a function of time.
- FIG. 3 b shows, over the same time, the current amplitude I of the output current of the HF generator 10 and FIGS. 3 c and 3 d show switched states of two switches S 1 and S 2 on two instruments 30 1 and 30 2 .
- the switch S 1 is closed via the associated actuation switch 32 at the time t 1 .
- the actuation signal is passed on to the control device 11 , which raises the output voltage of the HF generator 10 to the ignition voltage U Z (see FIG. 3 a ).
- the output voltage of the HF generator 10 is returned to the operational voltage (e.g. from 4 kV to 2 kV). It is assumed here that still no plasma has been ignited on the instrument 30 1 at this time. Accordingly, the output current of the HF generator 10 at this time is still at zero (see FIG. 3 b ).
- a further ignition pulse is issued, which ends again after the interval T Z , i.e. the output voltage of the HF generator 10 is returned again to the operational voltage U B .
- a plasma or arc is ignited so that the output current from the HF generator 10 rises to a level I P (see FIG. 3 b ).
- the control circuit to which is fed the amplitude of the output current of the HF generator 10 , can ascertain whether a current is being obtained that corresponds to the number of instruments 30 1 to 30 n with actuation switches 33 actuated.
- FIG. 2 initially differs from the one shown in FIG. 1 in that the large number of instrument hubs 12 is housed in an additional housing 8 , which is then connected to a generator housing 9 via appropriate connectors.
- a central valve 20 is provided in the generator housing that is connected to the inputs of the high-pass filters via an OR gate and opens only if at least one of the actuation elements 33 has been actuated.
- This arrangement (with one central valve) can naturally also be provided in the embodiment shown in FIG. 1 .
- the counter device 17 can also be provided in the embodiment shown in FIG. 2 .
Abstract
Description
- Not applicable.
- Not applicable.
- Not applicable.
- The invention relates to an APC device according to the generic definition of
Claim 1. - APC devices for the operation of instruments for argon plasma coagulation are known, wherein other inert gases besides argon can be used. Reference is made here only be way of example to WO 93/01758.
- In large-scale operations, namely when several surgeons are working on one patient, a separate APC device must be available to each of the surgeons to enable him to connect the instrument he is currently using. This is often not possible, not only for cost reasons, but also because it leads to highly constricted space conditions.
- The invention is based on the task of constructing an APC device so that several instruments can be operated simultaneously with one single device.
- In the case of an APC device for the operation of at least one instrument for argon plasma coagulation, comprising a HF generator to produce a coagulation flow, a control device to control an amplitude of a HF voltage and to adjust a high ignition voltage on an actuation signal, in addition to automatically adjusting a low work voltage as soon as a plasma has been ignited, at least one exit hub for connection of an instrument that comprises an actuation element to produce the actuation signal, this task is resolved in that at least one further connection hub is provided for the simultaneous connection and the simultaneous operation of at least one further instrument and the control device is connected to all exit hubs and is configured in such a manner that during actuation of at least one actuation element and production of at least one actuation signal the HF voltage is interrupted for a define interruption time (t4-t3), the HF voltage is then adjusted to the ignition voltage (UZ) and, after ignition of the plasma on all connected instruments, the HF voltage is adjusted to the operational voltage (UB).
- Therefore, one essential point of the invention lies in the fact that, during operation of an instrument, when a further instrument is activated operation of the first (already operating) instrument is briefly interrupted and then a plasma is ignited or re-ignited simultaneously on both instruments. This interruption only negligibly disrupts the currently working surgeon because the plasma may occasionally be extinguished anyway if the correct minimum distance required for working is exceeded.
- The interruption duration is preferably set to a very short time, namely less than 100 ms and preferably less than 20 ms. This duration is then so short that it is not even visually perceived by the surgeon.
- In conventional devices, the amplitude of the coagulation current, for example, is measured to ascertain whether a plasma has been ignited. The HF voltage is then switched back from the ignition voltage to the operational voltage when the real current component exceeds a specific, preset value or another identifying feature of the arc (e.g. the complex resistance of the plasma or a resulting specific signal form) is present.
- In one embodiment of the invention, the HF voltage is switched back from the ignition voltage to the operational voltage when the current amplitude corresponds to the sum of all coagulation currents that flow to the instruments with the actuation elements actuated after ignition of each plasma. Therefore, an “attempt” is made to ignite until all (actuated) instruments produce a plasma.
- To this end, an instrument counter can be provided and configured so that the number of existing actuation signals is recorded, the sum of the coagulation currents before or on arrival of a further actuation signal is detected and the HF voltage is then switched back to the operational voltage when the coagulation current from the HF generator corresponds to the number after arrival of the further actual signal compared with the number before arrival of the further actuation signal. Therefore, which coagulation current has to flow in total when a plasma is present at all actuated instruments is “estimated”. It goes without saying that it is also possible to realise this “estimation” via the aforementioned further measures.
- The ignition voltage is preferably maintained in the form of an ignition pulse for a predetermined duration and is then reduced to the operational voltage. After it has dropped to the operational voltage, a further ignition pulse is then produced if the plasma has not been ignited on all instruments with actuated actuation elements. This measure serves the purpose of safety, to avoid excessive introduction of energy during the presence of the ignition voltage.
- In a further embodiment of the invention, the further instrument hubs are not arranged in the APC device itself, but in an additional housing for connection to the APC device. As a result, (if required) existing APC devices can be converted to devices configured according to the invention and accordingly capable of use by several users.
- Preferred embodiments of the invention are derived from the sub-claims.
- Example of embodiments of the invention are explained below with reference to figures. The figures show:
-
FIG. 1 a schematic depiction of a first embodiment of the invention, -
FIG. 2 a schematic depiction of a second embodiment of the invention with an additional housing and -
FIGS. 3 a-3 d schematic depictions of voltage and current profiles. - In the following description, the same reference numbers are used to denote identical parts and those that have an identical effect.
- As shown in
FIG. 1 , the instruments 30 1 to 30 n comprise hollow bodies with a distally arrangednozzle 32, in whose proximity anelectrode 31 is arranged in the hollow body. Anactuation switch 33 for actuation of the switches S1 to Sn is provided as the actuation element. Theelectrode 31, the switches S1 to Sn and the interiors of the instruments 30 1 to 30 n are connected to aninstrument hub 12 on the APC device via a connectinglead 34 and aninstrument connector 35. From there, the leads are routed on to aHF generator 10, through avalve 15 to anargon source 16 and acontrol device 11, which controls (open or closed loop) thegenerator 10 and possibly also the argon source (in particular its pressure). - The above depiction is merely an equivalent depiction and does not show the exact structure of the known APC devices. In particular the devices 30 1 to 30 n can be structured differently, e.g. as probes, wherein the
actuation switches 33 are usually configured as foot switches. This outline depiction will, however, suffice for an understanding of the present invention. - According to the present invention, each of the instruments 30 1 to 30 n is connected via one
instrument connector 35 each to one ofseveral instrument hubs 12. For generation of an actuation signal (this also is only a very schematic depiction), avoltage source 13 and, closing the circuit between thevoltage source 13 and the switch S1 to Sn, a resistor of a high-pass filter 14 are provided whose capacitor is connected at the output end to the capacitors of thefurther instrument hub 12. Together, these output hubs of the capacitors or of the high-pass filters 14 are connected to an input of thecontrol device 11. - The input ends of the high-
pass filters 14 are also connected to acounter device 17 that comprises an adder(-subtracter) and an A/D converter. - This arrangement makes it possible on the one hand for the
control device 11 to obtain information about the time when one of theactuation switches 33 is closed (this information is present at the output of the high-pass filter 14) and, on the other hand, how many actuation switches are currently actuated. Moreover, when theappropriate actuation switch 33 is actuated, thevalve 15 for each instrument 30 1 to 30 n is opened so that argon gas can only flow to the applicable instrument 30 1 to 30 n, or can only flow out of itsnozzle 32, when theassociated actuation switch 33 is actuated. - The (basic) operating principle of this arrangement is described below with reference to
FIGS. 3 a-3 d, wherein 3 a shows the course of the output amplitude U of theHF generator 10 and thus the course of the voltage between theelectrode 31 and the patient as a function of time.FIG. 3 b shows, over the same time, the current amplitude I of the output current of theHF generator 10 andFIGS. 3 c and 3 d show switched states of two switches S1 and S2 on two instruments 30 1 and 30 2. - According to
FIG. 3 c, the switch S1 is closed via the associatedactuation switch 32 at the time t1. The actuation signal is passed on to thecontrol device 11, which raises the output voltage of theHF generator 10 to the ignition voltage UZ (seeFIG. 3 a). After a predetermined interval TZ, the output voltage of theHF generator 10 is returned to the operational voltage (e.g. from 4 kV to 2 kV). It is assumed here that still no plasma has been ignited on the instrument 30 1 at this time. Accordingly, the output current of theHF generator 10 at this time is still at zero (seeFIG. 3 b). After a waiting interval TI, a further ignition pulse is issued, which ends again after the interval TZ, i.e. the output voltage of theHF generator 10 is returned again to the operational voltage UB. At this time, according to the example shown here, a plasma (or arc) is ignited so that the output current from theHF generator 10 rises to a level IP (seeFIG. 3 b). - If the
actuation switch 33 of a further instrument 30 2 is now actuated at a later time t3 and the associated switch S2 is closed (seeFIG. 3 d), theHF 10 generator is deactivated, and so its output current and output voltage drop to zero. After a predetermined interval, an ignition operation as described above is again initiated at a time t4. In this case, the chosen interval t3-t4 is very short, thus avoiding (substantially disrupting work with the instrument 30 1. - Now, in the situation shown in
FIG. 3 , it is assumed that, at the time t4, a plasma has been ignited only on one of the instruments 30 1 or 30 2. Therefore, the current flowing out of thegenerator 10 still corresponds to the current IP that is present at only one instrument (as in the period t2 to t3) when a plasma is present. Accordingly, thecontrol device 11 generates a further ignition pulse at the time t5. Here, it is now assumed that a plasma has been ignited on both instruments 30 1 and 30 2 so that the current rises to the value 2IP at the time t5. By the value of this current amplitude, the control circuit, to which is fed the amplitude of the output current of theHF generator 10, can ascertain whether a current is being obtained that corresponds to the number of instruments 30 1 to 30 n withactuation switches 33 actuated. - Also in relation to this description, it must be mentioned that it is merely very schematic. In particular, the current amplitudes are reproduced only very schematically because differing currents (depending on the distance from the tissue) are needed for the various connected instruments. It is also possible to determine the number of ignited plasmas in another way. What is important, however, is that ignition pulses are generated for the length of time that is needed for a plasma to be present at all instruments whose actuation elements have been actuated.
- The embodiment of the invention shown in
FIG. 2 initially differs from the one shown inFIG. 1 in that the large number ofinstrument hubs 12 is housed in an additional housing 8, which is then connected to agenerator housing 9 via appropriate connectors. - Furthermore, in the case of the embodiment shown in
FIG. 2 , acentral valve 20 is provided in the generator housing that is connected to the inputs of the high-pass filters via an OR gate and opens only if at least one of theactuation elements 33 has been actuated. This arrangement (with one central valve) can naturally also be provided in the embodiment shown inFIG. 1 . Equally, thecounter device 17 can also be provided in the embodiment shown inFIG. 2 . -
- 8 Additional housing
- 9 Generator housing
- 10 HF generator
- 11 Control device
- 12 Instrument hub
- 13 Voltage source
- 14 High-pass filter
- 15 Valve
- 16 Argon source
- 17 Counter device
- 20 Central valve
- 21 OR gate
- 30 Instrument
- 31 Electrode
- 32 Nozzle
- 33 Actuation element
- 34 Connecting lead
- 35 Instrument connector
Claims (6)
Applications Claiming Priority (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004033616 | 2004-07-12 | ||
DE102004033616 | 2004-07-12 | ||
DE102004033616.4 | 2004-07-12 | ||
DE102004037084A DE102004037084B4 (en) | 2004-07-12 | 2004-07-30 | APC device |
DE102004037084.2 | 2004-07-30 | ||
DE102004037084 | 2004-07-30 | ||
PCT/EP2005/007404 WO2006005534A1 (en) | 2004-07-12 | 2005-07-08 | Apc device |
Publications (2)
Publication Number | Publication Date |
---|---|
US20070233058A1 true US20070233058A1 (en) | 2007-10-04 |
US7758575B2 US7758575B2 (en) | 2010-07-20 |
Family
ID=34972830
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/571,850 Expired - Fee Related US7758575B2 (en) | 2004-07-12 | 2005-07-08 | APC device |
Country Status (5)
Country | Link |
---|---|
US (1) | US7758575B2 (en) |
EP (1) | EP1796566B1 (en) |
JP (1) | JP4653808B2 (en) |
DE (2) | DE102004037084B4 (en) |
WO (1) | WO2006005534A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009090361A1 (en) * | 2008-01-14 | 2009-07-23 | Gyrus Medical Limited | Electrosurgical system |
US20110112526A1 (en) * | 2008-06-30 | 2011-05-12 | Martin Fritz | Electrosurgical generator for the treatment of a biological tissue, method for regulating an output voltage of an electrosurgical generator, and corresponding use of the electrosurgical generator |
US20140074090A1 (en) * | 2011-05-09 | 2014-03-13 | Ionmed Ltd | Tissue welding using plasma |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011123124A1 (en) | 2010-03-31 | 2011-10-06 | Colorado State University Research Foundation | Liquid-gas interface plasma device |
JP2011521735A (en) | 2008-05-30 | 2011-07-28 | コロラド ステート ユニバーシティ リサーチ ファンデーション | System, method and apparatus for generating plasma |
JP2011522381A (en) | 2008-05-30 | 2011-07-28 | コロラド ステート ユニバーシティ リサーチ ファンデーション | Plasma-based chemical source apparatus and method of use thereof |
US8994270B2 (en) | 2008-05-30 | 2015-03-31 | Colorado State University Research Foundation | System and methods for plasma application |
US8222822B2 (en) | 2009-10-27 | 2012-07-17 | Tyco Healthcare Group Lp | Inductively-coupled plasma device |
AU2010349785B2 (en) | 2010-03-31 | 2014-02-27 | Colorado State University Research Foundation | Liquid-gas interface plasma device |
US9532826B2 (en) | 2013-03-06 | 2017-01-03 | Covidien Lp | System and method for sinus surgery |
US9555145B2 (en) | 2013-03-13 | 2017-01-31 | Covidien Lp | System and method for biofilm remediation |
CN107518942A (en) * | 2017-07-03 | 2017-12-29 | 重庆金山医疗器械有限公司 | A kind of argon flow amount control method and control system |
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US6113596A (en) * | 1996-12-30 | 2000-09-05 | Enable Medical Corporation | Combination monopolar-bipolar electrosurgical instrument system, instrument and cable |
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US20040044339A1 (en) * | 2000-11-21 | 2004-03-04 | Jurgen Beller | Method for operating an instrument for use in high-frequency surgery, and electrosurgical device |
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US5207675A (en) | 1991-07-15 | 1993-05-04 | Jerome Canady | Surgical coagulation device |
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DE19706269A1 (en) | 1996-03-21 | 1997-09-25 | Valleylab Inc | Instrument for gas-enriched electrosurgery |
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US6206878B1 (en) * | 1999-05-07 | 2001-03-27 | Aspen Laboratories, Inc. | Condition responsive gas flow adjustment in gas-assisted electrosurgery |
JP2005528737A (en) * | 2002-03-28 | 2005-09-22 | アピト コープ.エス.アー. | Atmospheric plasma surface treatment method and apparatus for executing the same |
-
2004
- 2004-07-30 DE DE102004037084A patent/DE102004037084B4/en not_active Expired - Fee Related
-
2005
- 2005-07-08 WO PCT/EP2005/007404 patent/WO2006005534A1/en active Application Filing
- 2005-07-08 JP JP2007520723A patent/JP4653808B2/en not_active Expired - Fee Related
- 2005-07-08 EP EP05762345A patent/EP1796566B1/en not_active Expired - Fee Related
- 2005-07-08 DE DE502005008115T patent/DE502005008115D1/en active Active
- 2005-07-08 US US11/571,850 patent/US7758575B2/en not_active Expired - Fee Related
Patent Citations (4)
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US6113596A (en) * | 1996-12-30 | 2000-09-05 | Enable Medical Corporation | Combination monopolar-bipolar electrosurgical instrument system, instrument and cable |
US6565558B1 (en) * | 1998-09-01 | 2003-05-20 | Heinz Lindenmeier | High-frequency device for generating a plasma arc for the treatment of biological tissue |
US20030069576A1 (en) * | 2000-10-12 | 2003-04-10 | Tanrisever Naim Erturk | Quantum energy surgical device and method |
US20040044339A1 (en) * | 2000-11-21 | 2004-03-04 | Jurgen Beller | Method for operating an instrument for use in high-frequency surgery, and electrosurgical device |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009090361A1 (en) * | 2008-01-14 | 2009-07-23 | Gyrus Medical Limited | Electrosurgical system |
US20090192509A1 (en) * | 2008-01-14 | 2009-07-30 | Curtis Richard J | Electrosurgical system |
GB2467510A (en) * | 2008-01-14 | 2010-08-04 | Gyrus Medical Ltd | Electrosurgical system |
GB2467510B (en) * | 2008-01-14 | 2011-11-16 | Gyrus Medical Ltd | Electrosurgical system |
US20110112526A1 (en) * | 2008-06-30 | 2011-05-12 | Martin Fritz | Electrosurgical generator for the treatment of a biological tissue, method for regulating an output voltage of an electrosurgical generator, and corresponding use of the electrosurgical generator |
JP2011526169A (en) * | 2008-06-30 | 2011-10-06 | エルベ エレクトロメディツィン ゲーエムベーハー | Electrosurgical generator for treatment of biological tissue, method for adjusting the output voltage of the electrosurgical generator and corresponding use of the electrosurgical generator |
US8920412B2 (en) | 2008-06-30 | 2014-12-30 | Erbe Elektromedizin Gmbh | Electrosurgical generator for the treatment of a biological tissue, method for regulating an output voltage of an electrosurgical generator, and corresponding use of the electrosurgical generator |
US20140074090A1 (en) * | 2011-05-09 | 2014-03-13 | Ionmed Ltd | Tissue welding using plasma |
Also Published As
Publication number | Publication date |
---|---|
JP2008505724A (en) | 2008-02-28 |
US7758575B2 (en) | 2010-07-20 |
EP1796566B1 (en) | 2009-09-09 |
JP4653808B2 (en) | 2011-03-16 |
WO2006005534A1 (en) | 2006-01-19 |
EP1796566A1 (en) | 2007-06-20 |
DE102004037084A1 (en) | 2006-02-16 |
DE102004037084B4 (en) | 2008-07-31 |
DE502005008115D1 (en) | 2009-10-22 |
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